This story has been made freely available as a public service to our readers. Please consider supporting SCMP’s journalism by subscribing.Hong Kong once again enjoyed a few sunny spells on Tuen Ng Festival, just a day after the city issued its top-tier black rainstorm warning twice only hours apart, as some hiking experts warned outdoor enthusiasts to be mindful of safety hazards.The Hong Kong Observatory said that Friday, the day of this year’s Dragon Boat Festival, would see sunny intervals...